After three days and 66 visitors, it seems this is a difficult question. Frankly, I am very surprised that nobody could (wants?) help me. I feel forced myself to simplify the question: COULD ANYBODY SHOW ME AN EXAMPLE CODE IN XE5-DELPHI WHICH COULD READ AND WRITE EXCEL-2000 FILES? NOT GUESSES, OPINIONS, IDEAS, ADVICES! A FULLY FUNCTIONAL PROGRAM WITH COMPILED VERSIONS RUNNING ON XP, VISTA, WIN7 32/64 BIT MACHINES?! IS THIS REALLY SO DIFFICULT IN XE5-DELPHI????